Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:18:33

Orbital Elements for STT269AB

WDS:	STT269AB	WDS ID/Discoverer
P:	53.200	Orbital period (years)
a:	0.166	Semi-major axis (arcseconds)
i:	58.0	Inclination (degrees)
Ω:	44.8	Longitude of ascending node (degrees)
T:	1988.000	Epoch of periastron passage (year)
e:	0.868	Eccentricity
ω:	0.0	Longitude of periastron (degrees)
Start-Year:	1999.0	Year
End-Year:	2051.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT269AB

Position:	133251.02+345425.8	Epoch-2000 right ascension and declination
WDS-ID:	13329+3454	WDS designation
Discoverer Code:	STT269AB	Discover designation and components
ADS number:	8939	Aitken Double Star catalog
HD number:	117902	HD catalog number
Hipparcos number:	66089	Hipparcos catalog number
V1:	7.27	Magnitude of the primary
V2:	8.08	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STT269AB

WDS 6th Orbit including measures of STT269AB

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)

Ephemeris of STT269AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.274    230.6
-------------------------
1999.0     0.226    215.0
2000.0     0.237    215.9
2001.0     0.247    216.7
2002.0     0.257    217.5
2003.0     0.265    218.2
2004.0     0.273    218.9
2005.0     0.280    219.6
2006.0     0.286    220.2
2007.0     0.291    220.8
2008.0     0.296    221.3
2009.0     0.300    221.9
2010.0     0.303    222.4
2011.0     0.306    222.9
2012.0     0.308    223.5
2013.0     0.309    224.0
2014.0     0.310    224.5
2015.0     0.310    225.0
2016.0     0.309    225.5
2017.0     0.308    226.0
2018.0     0.306    226.5
2019.0     0.304    227.1
2020.0     0.301    227.6
2021.0     0.297    228.2
2022.0     0.292    228.7
2023.0     0.287    229.3
2024.0     0.281    229.9
2025.0     0.274    230.6
2026.0     0.267    231.2
2027.0     0.259    231.9
2028.0     0.249    232.7
2029.0     0.239    233.5
2030.0     0.228    234.4
2031.0     0.216    235.4
2032.0     0.203    236.5
2033.0     0.188    237.8
2034.0     0.173    239.3
2035.0     0.155    241.1
2036.0     0.136    243.5
2037.0     0.115    246.6
2038.0     0.090    251.3
2039.0     0.063    259.8
2040.0     0.033    283.1
2041.0     0.021     23.6
2042.0     0.023    139.8
2043.0     0.051    183.8
2044.0     0.080    195.6
2045.0     0.105    201.4
2046.0     0.128    205.0
2047.0     0.148    207.6
2048.0     0.166    209.6
2049.0     0.182    211.2
2050.0     0.197    212.6

Disclaimer

Acknowledgements

The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory.